JPH02130118U - - Google Patents
Info
- Publication number
- JPH02130118U JPH02130118U JP3961289U JP3961289U JPH02130118U JP H02130118 U JPH02130118 U JP H02130118U JP 3961289 U JP3961289 U JP 3961289U JP 3961289 U JP3961289 U JP 3961289U JP H02130118 U JPH02130118 U JP H02130118U
- Authority
- JP
- Japan
- Prior art keywords
- pass filter
- midpoint
- ground
- switch
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Filters And Equalizers (AREA)
Description
第１図は本考案の一実施例のフイルタの構成図
、第２図は第１図におけるそれぞれの受信バンド
における等価回路図、第３図、〜第５図は従来技
術によるフイルタの構成図である。
１……アンテナ入力端子、６……高周波増幅回
路、１１……Ｔ形ハイパスフイルタ、１２……Ｔ
形ローパスフイルタ、１３，１４……スイツチ、
１５，１６，２０……容量、１７，１８，１９…
…インダクタ。
Fig. 1 is a block diagram of a filter according to an embodiment of the present invention, Fig. 2 is an equivalent circuit diagram for each receiving band in Fig. 1, and Figs. 3 to 5 are block diagrams of a filter according to the prior art. be. 1...Antenna input terminal, 6...High frequency amplification circuit, 11...T-type high pass filter, 12...T
Type low-pass filter, 13, 14... switch,
15, 16, 20... Capacity, 17, 18, 19...
...Inductor.
Claims (1)
ーパスフイルタのそれぞれの中点・接地間にスイ
ツチを配し、高い周波数の受信時には前記ローパ
スフイルタの中点と接地間に配された前記スイツ
チを短絡し、低い周波数の受信時には前記ハイパ
スフイルタの中点と接地間に配された前記スイツ
チを短絡する構造を特徴とする入力フイルタ。 A switch is placed between the midpoint and ground of each of the T-type high-pass filter and T-type low-pass filter connected in parallel, and when receiving a high frequency, the switch placed between the midpoint of the low-pass filter and the ground is short-circuited. An input filter characterized in that the switch arranged between the midpoint of the high-pass filter and ground is short-circuited when receiving a low frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3961289U JPH02130118U (en) | 1989-04-05 | 1989-04-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3961289U JPH02130118U (en) | 1989-04-05 | 1989-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130118U true JPH02130118U (en) | 1990-10-26 |
Family
ID=31548677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3961289U Pending JPH02130118U (en) | 1989-04-05 | 1989-04-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130118U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002054591A1 (en) * | 2000-12-28 | 2002-07-11 | Matsushita Electric Industrial Co., Ltd. | High frequency low-pass filter |
| JP2003060462A (en) * | 2001-08-16 | 2003-02-28 | Murata Mfg Co Ltd | Composite element |
| JP2003078378A (en) * | 2001-08-31 | 2003-03-14 | Murata Mfg Co Ltd | Composite element |
| WO2004102794A1 (en) * | 2003-05-14 | 2004-11-25 | Advantest Corporation | Input signal processing device, high-frequency component acquisition method, and low-frequency component acquisition method |
| JP2006180352A (en) * | 2004-12-24 | 2006-07-06 | Soshin Electric Co Ltd | Electronic component |
-
1989
- 1989-04-05 JP JP3961289U patent/JPH02130118U/ja active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002054591A1 (en) * | 2000-12-28 | 2002-07-11 | Matsushita Electric Industrial Co., Ltd. | High frequency low-pass filter |
| EP1349272A1 (en) * | 2000-12-28 | 2003-10-01 | Matsushita Electric Industrial Co., Ltd. | High frequency low-pass filter |
| EP1349272A4 (en) * | 2000-12-28 | 2006-02-01 | Matsushita Electric Ind Co Ltd | High frequency low-pass filter |
| JP2003060462A (en) * | 2001-08-16 | 2003-02-28 | Murata Mfg Co Ltd | Composite element |
| JP2003078378A (en) * | 2001-08-31 | 2003-03-14 | Murata Mfg Co Ltd | Composite element |
| WO2004102794A1 (en) * | 2003-05-14 | 2004-11-25 | Advantest Corporation | Input signal processing device, high-frequency component acquisition method, and low-frequency component acquisition method |
| JP2006180352A (en) * | 2004-12-24 | 2006-07-06 | Soshin Electric Co Ltd | Electronic component |